Sirach 41:16

16 Therefore be shamefaced according to my word: for it is not good to retain all shamefacedness; neither is it altogether approved in every thing.

Sirach 41:16 In-Context

14 My children, keep discipline in peace: for wisdom that is hid, and a treasure that is not seen, what profit is in them both?
15 A man that hideth his foolishness is better than a man that hideth his wisdom.
16 Therefore be shamefaced according to my word: for it is not good to retain all shamefacedness; neither is it altogether approved in every thing.
17 Be ashamed of whoredom before father and mother: and of a lie before a prince and a mighty man;
18 Of an offence before a judge and ruler; of iniquity before a congregation and people; of unjust dealing before thy partner and friend;

The Brenton translation of the Septuagint is in the public domain.